Did you know fantastic help is an anagram of Planet Catfish? This forum is for those of you with pictures of your catfish who are looking for help identifying them. There are many here to help and a firm ID is the first step towards keeping your catfish in the best conditions.
At a glance it does seem to be a pseudopimelodus species but as Viktor notes it does seem larger then p. bufonis as their adult sizes rarely exceed 23 cm (9") TL. I once had a darker version of p. bufonis that grew to 28 cm (11") TL. Without seeing a horizontal profile to reveal markings and caudal fin shape it's mostly guesswork...